/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.netbeans.modules.java.source.parsing;

import java.io.IOException;

/**
 *
 * @author Tomas Zezula
 */
public interface PrefetchableJavaFileObject extends InferableJavaFileObject {

    /**
     * Pre-fetches the data into memory.
     * @return number of pre-fetched bytes.
     * @throws IOException 
     */
    int prefetch() throws IOException;

    /**
     * Frees the pre-fetches data from memory.
     * @return number of freed bytes.
     */
    int dispose();
    
}
